Noise Analysis: When moving, increasing the distance between the vanes, the bit stream to reduce the influence of interference effects than the speed of change in the wake of faster large flow axial fan blade acts as a sound barrier but also with increasing distance decreases. Thus, at least three parameters that affect the size of the interference noise: blade shape velocity waveform (ie blade loading), leaf blades radiating surface distance between the columns and as a sound source. Very small pitch may have two acoustic impact. If the vanes on the rotor blades interference field force established to make the rotor blades into a pulsating sound source, while the leaves are still sound barrier. Maintenance: 1, the fan blower found abnormal noise during operation, the motor severe fever, live shell, switch trip, you can not start and so on, should immediately stop checking. In order to ensure the safety of Jiuzhou axial fan, the fan does not allow for the maintenance operation, commissioning should be carried out about five minutes after the overhaul cbf axial fans, confirmed that no anomalies start running again. 2, according to occasional supplement or replace the bearing grease (motor enclosed bearing service life without replacing the grease), to ensure that the fan is running in good lubrication, refueling times less than 1000 hours under ambient conditions / closure of the bearings and motor bearings, fuel zl-3 with lithium grease filling 1/3 of the bearing inner and outer rings; non-starvation running. bdz axial fan axial fan _ _ Changyi Chen Yu-conditioned first-class quality provided by Wu Cheng Chen-yu air-conditioning Limited. Wu Cheng Chen Yu Air Conditioning Equipment Co., Ltd. (www.wccykt.com) strong, credible, in Dezhou fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Chenyu air conditioning and you hand into the brilliant, for a better future!